Perhaps you should try some spelling variations:
"pham hoan trinh slippers" » "pham khoan trich slippers", "pham hoang thinh slippers", "pham hanh trinh slippers", "pham hoang trinh slippers", "phap hoan trinh slippers", "nham hoan trinh slippers", "pham hoan trinh slippery", "pham hoan trinh grippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("pham hoan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham hoan trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham hoan trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham hoan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.